Statute of Limitations for Account Stated / Open Account in Washington

Overview

In Washington, lawsuits to collect money are often time-limited by the statute of limitations (SOL). For debt claims framed as an “account stated” or as an “open account,” Washington does not appear to impose a distinct SOL sub-rule in the materials used for this guide. Instead, the claim typically falls under the general/default SOL period.

For DocketMath users, the goal is straightforward: translate the date facts in your case into a “last possible filing date” using a consistent statute-of-limitations method. Then you can sanity-check whether a demand, filing, or response timeline is aligned with the relevant SOL.

If you’re trying to make sense of your timeline, gather at least these dates (even before you use the calculator):

• Date of last payment (if any)
• Date of last transaction (for an open account)
• Date the “account stated” was supposedly agreed/acknowledged (often tied to a billing statement and subsequent assent)
• Date the lawsuit was filed (the filing date matters, not when you received notice)

Limitation period

Default SOL: 5 years

Washington’s general statute of limitations is 5 years. The period is calculated from the triggering event recognized by the applicable legal framework. For many debt-collection contexts, the practical trigger is the point at which the claim accrues—commonly tied to:

• the last unpaid obligation in an open account context, or
• the date of assent/acknowledgment for an account stated context.

Because this guide uses the general/default period (not a claim-type-specific sub-rule), the 5-year window is the baseline you’d apply unless a specific exception or different accrual fact pattern shifts the trigger.

How the clock affects “last filing date”

The SOL functions like a deadline calendar. Conceptually:

1. Identify the start date (accrual/trigger).
2. Add 5 years.
3. The resulting date is your deadline—a lawsuit filed after that deadline is generally time-barred.

Here’s a quick illustration using hypothetical dates (not legal advice):

How outputs change in DocketMath

When you use the DocketMath statute-of-limitations calculator (/tools/statute-of-limitations), your output typically changes based on:

• the accrual/trigger date you enter (the SOL clock start), and
• the number of years applied (5 years for the general/default period in Washington).

If you pick a later “start” date (for example, a later last-transaction date), the “last filing date” will move forward. Conversely, an earlier start date moves the deadline back.

What to do if the dates are unclear

Debt records can be messy. If you don’t know the correct trigger date:

• Check billing statements for the last invoice date and whether there was any acknowledgment behavior tied to an “account stated” theory.
• If there were multiple transactions, identify the latest transaction date that relates to the claimed balance.
• If there were partial payments, verify whether those payments are actually connected to the debt and which date series they correspond to.

Key exceptions

Even when the default period is 5 years, the deadline can change due to exceptions or doctrines that affect either when the clock starts or whether it pauses/tolls. Washington’s exceptions can be fact-intensive.

Common categories to consider for Washington debt timelines include:

• Accrual/trigger disputes

  • The most practical “exception” is sometimes not a statutory tolling event, but a different view of what counts as accrual (last transaction vs. acknowledgment date).
• Tolling or suspension doctrines

  • Some situations can pause or extend limitations periods, depending on statutory rules and the specific circumstances.
• Potential procedural timing effects

  • SOL analysis can interact with how a case is filed and amended, though those details depend on the posture of the case and the exact claim language.

Practical checklist for exception review (before you rely on a deadline)

Use this to organize your facts:

A careful SOL analysis usually requires aligning documents (statements, ledger entries, payment records) to the theory being asserted.

Statute citation

Washington’s general statute of limitations for many civil actions is 5 years, set out in:

• RCW 9A.04.080 — provides the general/default limitations period of five years.

For this guide’s purpose, no claim-type-specific sub-rule for account stated or open account was identified in the cited materials. Accordingly, the 5-year general/default period is the baseline used here.

Use the calculator

Turn your timeline into a clear deadline using DocketMath at:

• **/tools/statute-of-limitations

What to input (and why)

In general, the calculator will need:

• Trigger/accrual date (the date you select as the SOL start)
• Jurisdiction (Washington / US-WA)
• Statute period (the tool will apply the relevant period for the scenario; for this page’s general/default baseline it is 5 years)

How to interpret outputs

After you enter your dates, the calculator will provide:

• a calculated end date / last filing date based on a 5-year period (RCW 9A.04.080)
• an assessment of where a lawsuit filing date falls relative to that deadline (if you enter a filing date)

To improve reliability:

• Use the latest plausible trigger date if you’re trying to determine the most forgiving deadline.
• Use the earliest credible trigger date if you’re testing whether the claim might be time-barred under the tighter timeline.

If your deadline output changes substantially depending on a date choice, that’s a signal to focus on which document and theory actually controls accrual in your situation.

Sources and references

Start with the primary authority for Washington and confirm the effective date before relying on any output. If the rule has been amended, update the inputs and rerun the calculation.

• RCW 4.16.080

Related reading

• Choosing the right statute of limitations tool for Vermont — Tool comparison
• Statute of limitations in Singapore: how to estimate the deadline — How-to guide
• Choosing the right statute of limitations tool for Connecticut — Tool comparison